diff --git a/README.md b/README.md
index 7aec89f..3218e90 100644
--- a/README.md
+++ b/README.md
@@ -102,3 +102,41 @@ https://www.mvg.de/api/bgw-pt/v3/departures?globalId=de:09162:910&limit=10&trans
 | `/` | HTML-Ansicht, mobile-optimiert, Auto-Refresh alle 60s |
 | `/api/departures` | JSON-Liste aller gefilterten Abfahrten |
 | `/healthz` | Healthcheck fuer Docker/Watchtower |
+
+## Projektstruktur
+
+```
+mvg-departures/
+├── app/
+│   ├── main.py           # FastAPI-App, Endpunkte, Caching
+│   ├── config.py          # Config-Loader (YAML → Dataclasses)
+│   └── templates/
+│       └── index.html     # Jinja2-Template (Mobile-UI)
+├── config.yaml            # Stationskonfiguration
+├── requirements.txt       # Python-Dependencies
+├── Dockerfile
+└── .github/workflows/
+    └── build.yml          # CI/CD: Docker-Build + GHCR-Push
+```
+
+## Tech-Stack
+
+- **Runtime**: Python 3.12
+- **Framework**: FastAPI + Uvicorn
+- **Templating**: Jinja2 (server-seitig)
+- **MVG-API**: `mvg` Python-Client (oeffentlich, kein Auth noetig)
+- **Config**: YAML via `pyyaml`
+- **Container**: Docker (python:3.12-slim)
+
+## Caching
+
+- **Station-ID**: In-memory Dict, lifetime=Session (loest Station-Namen auf)
+- **Abfahrten**: In-memory Dict, TTL=`cache_seconds` (Default: 20s) pro Station+Typ
+- Keine Persistenz → Neustart = Cache-Verlust
+
+## Einschraenkungen
+
+- Kein WebSocket/Live-Updates (nur periodischer Meta-Refresh)
+- Keine Datenbank (nur In-Memory)
+- Kein Test-Framework vorhanden
+- Ein `config.yaml` pro Deployment (kein Multi-Tenancy)
diff --git a/app/templates/index.html b/app/templates/index.html
index 37feb6a..e270dfa 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -13,16 +13,16 @@
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
     background: #111417;
     color: #eaeaea;
-    font-size: 15px;
+    font-size: 20px;
   }
   h1 {
-    font-size: 16px;
+    font-size: 24px;
     margin: 4px 0 10px 4px;
     color: #9aa5b1;
     font-weight: 500;
   }
   .updated {
-    font-size: 11px;
+    font-size: 14px;
     color: #6b7280;
     margin-left: 4px;
   }
@@ -34,18 +34,18 @@
     border-bottom: 1px solid #23272d;
   }
   td {
-    padding: 8px 4px;
+    padding: 12px 6px;
     vertical-align: middle;
   }
   .icon {
     display: inline-block;
-    width: 26px;
-    height: 26px;
-    line-height: 26px;
+    width: 32px;
+    height: 32px;
+    line-height: 32px;
     text-align: center;
     border-radius: 6px;
     font-weight: 700;
-    font-size: 13px;
+    font-size: 16px;
     color: #111417;
   }
   .icon-U { background: #005ca9; color: #fff; }
@@ -54,21 +54,21 @@
   .icon-B { background: #55545a; color: #fff; }
   .line {
     font-weight: 700;
-    font-size: 14px;
+    font-size: 18px;
     display: block;
   }
   .station {
-    font-size: 11px;
+    font-size: 14px;
     color: #6b7280;
   }
   .destination {
-    font-size: 14px;
+    font-size: 18px;
   }
   .time {
-    text-align: right;
+    text-align: center;
     white-space: nowrap;
     font-weight: 700;
-    font-size: 15px;
+    font-size: 20px;
   }
   .delay {
     font-size: 12px;